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WO2013045280A1 - Dérivés d'alcools alkyliques de 1-phényl-2-pyridinyle en tant qu'inhibiteurs de phosphodiestérase - Google Patents

Dérivés d'alcools alkyliques de 1-phényl-2-pyridinyle en tant qu'inhibiteurs de phosphodiestérase Download PDF

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Publication number
WO2013045280A1
WO2013045280A1 PCT/EP2012/067954 EP2012067954W WO2013045280A1 WO 2013045280 A1 WO2013045280 A1 WO 2013045280A1 EP 2012067954 W EP2012067954 W EP 2012067954W WO 2013045280 A1 WO2013045280 A1 WO 2013045280A1
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Prior art keywords
phenyl
cyclopropylmethoxy
ethyl
oxide
pyridine
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Ceased
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PCT/EP2012/067954
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English (en)
Inventor
Elisabetta Armani
Gabriele Amari
Carmelida CAPALDI
Oriana ESPOSITO
Ilaria Peretto
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Chiesi Farmaceutici SpA
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Chiesi Farmaceutici SpA
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Priority to EP12770435.1A priority Critical patent/EP2760838B1/fr
Priority to CN201280046755.4A priority patent/CN103827088B/zh
Publication of WO2013045280A1 publication Critical patent/WO2013045280A1/fr
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
    • A61K31/5375—1,4-Oxazines, e.g. morpholine
    • A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/4427—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems
    • A61K31/4439—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. omeprazole
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/0028—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up
    • A61M15/0045—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up using multiple prepacked dosages on a same carrier, e.g. blisters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/009—Inhalators using medicine packages with incorporated spraying means, e.g. aerosol cans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A61P11/02—Nasal agents, e.g. decongestants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • A61P11/06—Antiasthmatics
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    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/55—Acids; Esters
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/56—Amides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/69—Two or more oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/89—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members with hetero atoms directly attached to the ring nitrogen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

  • the present invention relates to inhibitors of the phosphodiesterase 4 (PDE4) enzyme. More particularly, the invention relates to derivatives of l-phenyl-2- pyridinyl alkyl alcohols, methods of preparing such compounds, compositions containing them and therapeutic use thereof.
  • PDE4 phosphodiesterase 4
  • Airway obstruction characterizes a number of severe respiratory diseases including asthma and chronic obstructive pulmonary disease (COPD). Events leading to airway obstruction include oedema of airway walls, increased mucous production and inflammation.
  • COPD chronic obstructive pulmonary disease
  • Drugs for treating respiratory diseases such as asthma and COPD are currently administered through inhalation.
  • One of the advantages of the inhalatory route over the systemic one is the possibility of delivering the drug directly at site of action, reducing systemic side-effects, thus resulting in a more rapid clinical response and a higher therapeutic ratio.
  • Inhaled corticosteroids are the current maintenance therapy of choice for asthma and together with bronchodilator beta 2 -agonists for acute symptom relief, they form the mainstay of current therapy for the disease.
  • the current management of COPD is largely symptomatic by means of broncho dilating therapy with inhaled anticholinergics and inhaled beta 2 -adrenoceptor agonists.
  • corticosteroids do not reduce the inflammatory response in COPD as they do in asthma.
  • PDEs phosphodiesterases
  • PDE4 inhibitors Various compounds acting as PDE4 inhibitors have been disclosed in the prior art. However, the usefulness of several PDE4 inhibitors of the first -generation such as rolipram and piclamilast has been limited due to their undesirable side effects. Said effects include nausea and emesis due to their action on PDE4 in the central nervous system and gastric acid secretion due to the action on PDE4 in parietal cells in the gut.
  • PDE4 exists in two distinct forms representing different conformations, that were designated as high affinity rolipram binding site or HPDE4, especially present in the central nervous system and in parietal cells, and low affinity rolipram binding site or LPDE4 (Jacobitz, S et al Mol. Pharmacol, 1996, 50, 891-899), which is found in the immune and inflammatory cells. While both forms appear to exhibit catalytic activity, they differ with respect to their sensitivity to inhibitors. In particular compounds with higher affinity for LPDE4 appear less prone to induce side-effects such as nausea, emesis and increased gastric secretion.
  • roflumilast is under dosed in order to achieve an acceptable side effect profile.
  • EP 1634606 discloses, among others, ketone derivatives like benzofuran or 1 ,3-benzodioxole derivatives.
  • WO 9402465 discloses, among others, ketone derivatives of general formula
  • Ri is lower alkyl and R 2 may be alkyl, alkenyl, cycloalkyl, cycloalkyl, cycloalkenyl, cyclothioalkyl or cyclothioalkenyl.
  • WO 9535281 in the name of Celltech Therapeutics concerns tri-substituted phenyl derivatives.
  • WO 2009/018909 discloses derivatives of l-phenyl-2-pyridinyl alkyl alcohols which have general formula below reported
  • PDE4 phosphodiesterase 4
  • WO 2009/077068 discloses further derivatives of l-phenyl-2-pyridinyl alkyl alcohols which have general formula below reported
  • WO 2010/089107 discloses further derivatives of l-phenyl-2-pyridinyl alkyl alcohols which have general formula below reported
  • PDE4 phosphodiesterase 4
  • Such reduction of side effects may be achieved, by way of example, through a low systemic exposure of the drug; an appropriate profile in terms of some pharmacokinetic characteristics, especially metabolic clearance, may be thus key to this goal.
  • the present invention addresses the above mentioned need by providing the compounds of the invention.
  • the invention is directed to compounds acting as inhibitors of the phosphodiesterase 4 (PDE4) enzyme, methods of preparing said compounds, compositions containing them and therapeutic use thereof.
  • PDE4 phosphodiesterase 4
  • P i and R 2 are different or the same and are independently selected from the group consisting of:
  • R 4 is one or more substituents independently selected from the group consisting of H, CN, N0 2 , CF 3 and halogen atoms;
  • Z is a group selected in the list consisting of:
  • R 27 is hydrogen, (C1-C4) alkyl
  • R26 is selected in the group consisting of:
  • R 5 is hydrogen, (C 1 -C 4 ) alkyl or a phenyl group
  • R 6 is hydrogen or a group -NHRi 0 ;
  • R 7 is a (C1-C4) alkylthio(Ci-C4) alkyl group
  • X is selected in the group consisting of:
  • n 0 or 1 ;
  • Rs is hydrogen, (C1 -C 4 ) alkyl or (C3-C8)heterocycloalkyl(Ci-C 4 ) alkyl;
  • R9 is hydrogen, (C1-C 4 ) alkyl or a group -S02(Ci-C 4 ) alkyl;
  • Y is selected in the group consisting of:
  • K is selected in the group consisting of:
  • Rio is hydrogen or a group -S0 2 - (C 1 -C4) alkyl
  • J is a bond or a group [7]-CH(NH 2 )-[4];
  • R3 are one or more optional substituents which may be the same or different, and are independently selected from the group consisting of:
  • Rn is selected from the group consisting of:
  • Ri 2 is (Ci-C 6 ) alkyl
  • R 25 is selected from the group consisting of:
  • R13 and R14 are different or the same and are independently selected from the group consisting of:
  • R15 and Ri 6 are different or the same and are independently selected from the group consisting of: H and (Ci-C 6 ) alkyl, which is optionally substituted with (C 3 -C 7 ) cycloalkyl or (C 3 -C 7 ) heterocycloalkyl; or they form with the nitrogen atom to which they are linked a (C 3 -C y )heterocycloalkyl which is optionally substituted by (Ci-C 6 )alkyl;
  • R 17 is selected in the group consisting of: (Ci-C 6 ) alkyl optionally substituted by (C 3 -C 7 ) cycloalkyl or (C 3 -C 7 ) heterocycloalkyl; (C 3 -C 7 ) heterocycloalkyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or -OH;
  • Ri 8 is selected in the group consisting of: (Ci-C 6 ) alkyl optionally substituted by (C 3 -C7) cycloalkyl; (Ci-C 6 ) alkylcarboxyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or hydroxyl; and a group -NR 2 oR 2 i ; wherein R 2 o and R 2 i are different or the same and are independently selected from the group consisting of: H and (Ci-C 6 ) alkyl, which is optionally substituted with (Ci-C 6 )alkoxy;
  • R19 is selected in the group consisting of:
  • (Ci-C 6 ) alkyl optionally substituted by (C3-C7) cycloalkyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or -OH;
  • R 22 is phenyl, heterocycloalkyl or (Ci-C 6 ) alkyl
  • R 23 is (C1-C4) alkyl, -OH or NR 2 sR 2 9 wherein R 28 and R 2 g are each independently H or (C 1 -C 4 ) alkyl;
  • R 24 is H or (C1-C4) alkyl or (C1-C4) alkyl-NRi 3 Ri 4 ;
  • Ri 3 and Ri 4 are as defined above;
  • groups R 3 , R 4 , Rn, Ri 2 , Ri 3 , Ri 4 , R15, Rie, Rn, Ris, R19, R 2 o, R 2 i, R 22 , R 23 , R 2 4, R 2 5, R 2 8 and R 2 9 may assume the same or different meanings at each occurrence, if present in more than one group;
  • N-oxides on the pyridine ring and pharmaceutically acceptable salts, or solvates thereof.
  • the present invention is directed to compounds of formula
  • Ri and R 2 are different or the same and are independently selected from the group consisting of:
  • R 4 is one or more substituents independently selected from the group consisting of H, CN, N0 2 , CF 3 and halogen atoms;
  • Z is a group [3]-CH 2 -X-[4]; wherein [3] and [4] indicate the points of attachment for group Z with, respectively, carboxylic group and group W;
  • X is a group [5]-0-(CO)-(CH 2 ) n -[4]; wherein [5] and [4] indicate the points of attachment for group X with, respectively, methylene and W groups;
  • n 0;
  • W is a monocyclic or bicyclic heteroaryl ring
  • R 3 are one or more optional substituents which may be the same or different, and are independently selected from the group consisting of:
  • Rn is selected from the group consisting of:
  • Ri 2 is (Ci-C 6 ) alkyl
  • R 25 is selected from the group consisting of:
  • R13 and R14 are different or the same and are independently selected from the group consisting of:
  • R15 and Ri 6 are different or the same and are independently selected from the group consisting of: H and (Ci-C 6 ) alkyl, which is optionally substituted with (C 3 -C 7 ) cycloalkyl or (C 3 -C 7 ) heterocycloalkyl; or they form with the nitrogen atom to which they are linked a (C 3 -C y )heterocycloalkyl which is optionally substituted by (Ci-C 6 )alkyl;
  • R 17 is selected in the group consisting of: (Ci-C 6 ) alkyl optionally substituted by (C3-C7) cycloalkyl or (C3-C7) heterocycloalkyl; (C 3 -C 7 ) heterocycloalkyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or -OH;
  • Ri 8 is selected in the group consisting of: (Ci-C 6 ) alkyl optionally substituted by (C3-C7) cycloalkyl; (Ci-C 6 ) alkylcarboxyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or hydroxyl; and a group -NR 2 QR 2 I ; wherein R 20 and R21 are different or the same and are independently selected from the group consisting of: H and (Ci-C 6 ) alkyl, which is optionally substituted with (Ci-C 6 )alkoxy;
  • R19 is selected in the group consisting of: (Ci-C 6 ) alkyl optionally substituted by (C3-C7) cycloalkyl; and phenyl optionally substituted by one or more (Ci-C 6 ) alkyl, halogen or -OH;
  • R 22 is phenyl, heterocycloalkyl or (Ci-C 6 ) alkyl
  • R 23 is (C1-C4) alkyl, -OH or NR 2 sR 2 9 wherein R 28 and R 2 g are each independently H or (C1-C 4 ) alkyl;
  • R 24 is H or (C1-C4) alkyl or (C1-C4) alkyl-NRi 3 Ri 4 ;
  • Ri 3 and Ri 4 are as defined above;
  • R 3 , R 4 , Rn , Ri 2 , Ri 3 , Ri 4 , R15, Rie, Rn, Ri s, R19, R 2 o, R 2 i , R 22 , R 23 , R 24 , R 2 8, R 2 and R 25 may assume the same or different meanings at each occurrence, if present in more than one group;
  • N-oxides on the pyridine ring and pharmaceutically acceptable salts, or solvates thereof.
  • the invention also encompasses the pharmaceutically acceptable salts and/or solvates of compounds of formula (I) and (ID).
  • the invention further comprises the corresponding N-oxides on the pyridine ring of compounds of formula (I) and (ID).
  • the invention further comprises a process for the preparation of compounds of the invention.
  • the present invention also provides pharmaceutical compositions of compounds of the invention either alone or in combination, in admixture with one or more pharmaceutically acceptable carriers.
  • the present invention provides the use of the compounds of the invention as a medicament.
  • the present invention provides the use of the compounds of the invention for the manufacture of a medicament.
  • the present invention provides the use of the compounds of the invention for the prevention and/or treatment of any disease characterized by phosphodiesterase 4 (PDE4) overactivity and/or wherein an inhibition of PDE4 activity is desirable.
  • PDE4 phosphodiesterase 4
  • the compounds of the invention alone or combined with other active ingredients may be administered for the prevention and/or treatment of a disease the respiratory tract characterized by airway obstruction such as asthma and COPD.
  • the present invention provides the use of compounds of the invention for the preparation of a medicament for the prevention and/or treatment of any disease characterized by phosphodiesterase 4 (PDE4) overactivity and/or wherein an inhibition of PDE4 activity is desirable.
  • PDE4 phosphodiesterase 4
  • the present invention provides a method for prevention and/or treatment of any disease wherein PDE4 inhibition is desirable, said method comprises administering to a patient in need of such treatment a therapeutically effective amount of a compound of the invention.
  • halogen atoms as used herein includes fluorine, chlorine, bromine, and iodine, preferably chlorine.
  • (Ci-C x ) alkyl where x is an integer greater than 1 , refers to straight-chained and branched alkyl groups wherein the number of constituent carbon atoms is in the range 1 to x. Particular alkyl groups are methyl, ethyl, n-propyl, isopropyl and t-butyl.
  • (Ci-C x ) alkoxyl where x is an integer greater than 1 , refers to straight-chained and branched alkoxy groups wherein the number of constituent carbon atoms is in the range 1 to x.
  • Particular alkyl groups are methoxyl, ethoxyl, n-propoxyl, isopropoxyl and t-butoxyl.
  • (Ci-C6)haloalkyl refer to the above defined “(Ci-C6)alkyl” groups wherein one or more hydrogen atoms are replaced by one or more halogen atoms, which can be the same or different from each other.
  • Examples of said (Ci-Ce)haloalkyl groups may thus include halogenated, poly-halogenated and fully halogenated alkyl groups wherein all of the hydrogen atoms are replaced by halogen atoms, e.g. trifluoromethyl or difluoro methyl groups.
  • (Ci-C x )alkylN j N w refer to the above defined “(Ci-C x )alkyl” groups wherein one hydrogen atom is replaced by a group -N j N w .
  • (Ci-C x )alkylthio where x is an integer greater than 1 , refers to straight-chained and branched alkylthio groups wherein the number of constituent carbon atoms is in the range 1 to x and which is linked to other groups via sulfur. Particular alkylthio groups are methylthio, ethylthio, and so on.
  • (Ci-C x )alkylthio(Ci-C x )alkyl refer to the above "(Ci-C x )alkyl” group wherein one or more hydrogen atoms are replaced by one "(Ci-C x )alkylthio" group.
  • (C3-C y ) cycloalkyl refers to saturated cyclic hydrocarbon groups containing from 3 to y ring carbon atoms. Examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl.
  • (C 3 -C y )heterocycloalkyl refers to monocyclic (C 3 -C y )cycloalkyl groups, in which at least one ring carbon atom is replaced by a heteroatom (e.g. N, NH, S or O).
  • heteroatom e.g. N, NH, S or O.
  • Examples of (C 3 -C y )heterocycloalkyl include pyrrolidinyl, thiazolidinyl, piperazinyl, piperidinyl, morpholinyl, thiomorpholinyl.
  • amino carbonyl refers to a radical of formula -CONH 2 .
  • (Ci-C x )alkylcarboxyl refers to (Ci-C x )alkylCOO- groups wherein the group “(C3-C y )cycloalkyl” has the meaning above defined.
  • (C 3 -C y )heterocycloalkyl(Ci-C x ) alkyl refer to the above "(Ci-C x )alkyl” group wherein one or more hydrogen atoms are replaced by one or more "(C 3 -C y )heterocycloalkyl” groups.
  • aryl refers to mono or bi-cyclic ring systems which have 6 to 10 ring atoms, wherein at least one ring is aromatic.
  • heteroaryl refers to mono or bi-cyclic ring systems with 5 to 1 1 ring atoms, in which at least one ring is aromatic and in which at least one ring atom is a heteroatom (e.g. N, NH, S or O).
  • Suitable monocyclic aryl or heteroaryl systems include, for instance, phenyl, thiophene, benzene, pyrrole, pyrazole, imidazole, isoxazole, oxazole, isothiazole, thiazole, pyridine, imidazolidine, furan radicals and the like.
  • Suitable aryl or heteroaryl bicyclic systems include naphthalene, biphenylene, purine, pteridine, benzotriazole, quinoline, isoquinoline, indole, isoindole, benzothiophene, dihydrobenzo dioxin, dihydrobenzo dioxepin, benzo oxazin radicals and the like.
  • the invention is directed to a class of compounds acting as inhibitors of the phosphodiesterase 4 (PDE4) enzyme.
  • PDE4 phosphodiesterase 4
  • Said class of compounds inhibits the conversion of cyclic nucleotides, in particular cyclic adenosine monophosphate (cAMP), into their inactive 5 '-mononucleotide forms.
  • cyclic nucleotides in particular cyclic adenosine monophosphate (cAMP)
  • cAMP cyclic adenosine monophosphate
  • cyclic nucleotides in particular of cAMP, lead to the suppression of the activity of immune and pro-inflammatory cells such as mast cells, macrophages, T lymphocytes, eosinophils and neutrophils, resulting in a decrease of the release of inflammatory mediators which include cytokines such as IL-1 , IL-3 and tumor necrosis factor -alpha (TNF-cc).
  • cytokines such as IL-1 , IL-3 and tumor necrosis factor -alpha (TNF-cc).
  • the present invention relates to derivatives of l-phenyl-2-pyridinyl alkyl alcohols of general formula (I), pharmaceutically acceptable salts and N-oxides on the pyridine ring thereof,
  • R l s R 2 , R 3 , R 4 , Z and A are as above defined.
  • the present invention also relates to derivatives of l-phenyl-2-pyridinyl alkyl alcohols of general formula (ID), pharmaceutically acceptable salts and N-oxides on the pyridine ring thereof,
  • R l s R 2 , R 3 , R 4 , Z and W are as above defined.
  • “Pharmaceutically acceptable salts” refers to derivatives of compounds of formula (I) or (ID) wherein the parent compound is suitably modified by converting any of the free acid or basic group, if present, into the corresponding addition salt with any base or acid conventionally intended as being pharmaceutically acceptable.
  • Suitable examples of said salts may thus include mineral or organic acid addition salts of basic residues such as amino groups, as well as mineral or organic basic residues such as carboxylic groups.
  • Cations of inorganic bases which can be suitably used to prepare used to prepare salts within the invention comprise ions of alkali or alkaline earth metals such as potassium, sodium, calcium or magnesium.
  • Those obtained by reacting the main compound, functioning as a base, with an inorganic or organic acid to form a salt comprise, for example, salts of hydrochloric acid, sulfuric acid, phosphoric acid, methane sulfonic acid, camphor sulfonic acid, oxalic acid, maleic acid, succinic acid and citric acid.
  • the compounds according to the invention When the compounds according to the invention have at least one stereogenic center, they will exist as enantiomers. When the compounds according to the invention possess two or more stereogenic centers, they may additionally exist as diastereoisomers. It is to be understood that all such isomers and mixtures thereof in any proportion are encompassed within the scope of the present invention.
  • the present invention is directed to compounds of formula (I)', which are compounds of formula (I) as above defined where the absolute configuration of carbon (1) is shown herebelow:
  • the present invention is directed to compounds of formula (ID)', which are compounds of formula (ID) as above defined where the absolute configuration of carbon (1) is shown herebelow:
  • the absolute configuration for carbon (1) is assigned on the basis of Cahn-Ingold-Prelog nomenclature based on groups' priorities.
  • absolute configuration at carbon (1) is (S).
  • compounds of the invention are N-oxides derivatives of the pyridine ring.
  • 2-pyridinyl ring has two R 3 substituents which are halogen atom (for example 3,5- di chloro).
  • Ri is (Ci-C 6 ) haloalkyl (for example difluoromethyl) and R 2 is (Ci-C 6 ) alkyl which is substituted by (C3-C7) cycloalkyl (for example cyclopropyl methyl).
  • a preferred group of compounds of general formula (I) is that wherein the 2-pyridinyl ring is substituted in 3 and 5 with two atoms of chlorine, according to the general formula (IA)
  • R l s R 2 , R 3 and z are as defined above.
  • R 4 , Z and R 3 are as defined above, and their.
  • Z is selected in the list consisting of
  • Z is selected in the list consisting of:
  • Y is a group [3]-NR 9 -(CH2)n-[4], n is 1 and R 9 is hydrogen or (d-C 4 ) alkyl;
  • X is a group [5]-(CO)-0-(CH2)n[4] and n is 0 or i ;
  • X is a group [[5]-0-(CO)-(CH 2 ) n -[4] and n is 0 or i ;
  • X is a group [5]-NR 9 -(CH 2 ) n -[4], n is 0 or 1 , and R 9 is -S0 2 (Ci-C 4 ) alkyl;
  • R 8 is hydrogen, (C 1 -C4) alkyl or alkyl(heterocycloalkyl);
  • Y is a group [3]-NR 9 -(CH 2 ) n -[4], n is 0 and R 9 is (C1-C4) alkyl;
  • Z is [3]-CH 2 -X-[4] wherein X is selected in the group consisting of:
  • R 9 is hydrogen, (C1-C4) alkyl or -S0 2 (Ci-C 4 ) alkyl and n is 1.
  • Z is [3]-CH 2 -X-[4] wherein X is selected in the group consisting of:
  • R 9 is hydrogen, (C1-C4) alkyl or -S0 2 (Ci-C 4 ) alkyl and n is 1.
  • Z is [3]-Y-[4], wherein Y is selected in the group consisting of:
  • Z is [3]-Y-[4], wherein Y is a group [3]-NR 9 -(CH 2 ) n -[4].
  • Z is a group [3]-CHR 26 -NR 27 -S0 2 -[4].
  • Z is selected in the list consisting of:
  • K is a group [6]-NH-(CO)-[4]
  • a compound of formula (I) is selected in the group consisting of:
  • a compound of formula (ID) is selected in the group consisting of:
  • the N-oxides on the 2-pyridinyl ring of the compounds of general formula (I) may be prepared according to methods available in the literature and well known to the skilled person. For instance they may be prepared by dissolving the compound of general formula (I) in CH 2 CI 2 or CHCI 3 , then adding an oxidizing agent such as m-chloro perbenzoic acid (mCPBA) to the resulting solution.
  • mCPBA m-chloro perbenzoic acid
  • Other oxidizing agents which may be used are hydrogen peroxide, perbenzoic acid and peracetic acid.
  • the corresponding N-oxides are prepared by carrying out the oxidation step before further functional groups are introduced, for example on compounds of formula (II), thus generating compounds of formula (III).
  • the process for preparation of compounds of formula (I) is performed starting from N-oxide compound of formula (III) on the pyridine ring, thus allowing the preparation of compound of formula (I) in the form of N-oxides on the pyridine ring.
  • protecting group designates a protective group adapted to preserve the function of the group it is bound to.
  • protective groups are used to preserve amino, hydroxyl, or carboxyl functions.
  • Appropriate protecting groups may thus include, for example, benzyl, benzyloxycarbonyl, t-butoxycarbonyl, alkyl or benzyl esters or the like, which are well known to those skilled in the art [see, for a general reference, T.W. Green; Protective Groups in Organic Synthesis (Wiley, N.Y. 1981)].
  • Optional salification of the compounds of formula (I) or N-oxides on the pyridine ring thereof may be carried out by properly converting any of the free acidic or amino groups into the corresponding pharmaceutically acceptable salts.
  • the operative conditions being employed for the optional salification of the compounds of the invention are all within the ordinary knowledge of the skilled person.
  • compounds of formula (la), as above defined may be prepared according to the procedures described in Example 20 (Scheme 20) or Example 26 (Scheme 26) of experimental section or to appropriate variations thereof contemplated by the skilled person as above described.
  • compounds of formula (Ika) i.e. compounds of formula (Ik) as above defined wherein R 9 is (C 1 -C4) alkyl
  • R 9 is (C 1 -C4) alkyl
  • compounds of formula (Ija), i.e. compounds of formula (Ij) as above defined wherein n is 0, may be prepared according to the procedures described in Example 5 (Scheme 5), Example 6 (Scheme 6) or Example 7 (Scheme 7) of experimental section, or to appropriate variations thereof contemplated by the skilled person as above described.
  • Compounds of formula ( ⁇ ), i.e. compounds of formula (I) wherein Z is a group [3]- CHR 6 -CH 2 -[4], R 6 is a group -NHR 10 and Rio is hydrogen, may be prepared according to the procedures described in Example 35 (Scheme 35) or Example 48 (Scheme 48) of experimental section, or to appropriate variations thereof contemplated by the skilled person as above described.
  • Compounds of formula ( ⁇ ), i.e. compounds of formula (I) wherein Z is a group [3]- CHR 6 -CH 2 -[4] and R 6 is hydrogen may be prepared according to the procedures described in Example 44 (Scheme 44) of experimental section, or to appropriate variations thereof contemplated by the skilled person as above described.
  • compounds of formula ( ⁇ ), i.e. compounds of formula ( ⁇ ) as above defined wherein R 8 is hydrogen, may be prepared according to the procedures described in Example 37 (Scheme 37) of experimental section, or to appropriate variations thereof contemplated by the skilled person as above described.
  • the present invention also provides pharmaceutical compositions of compounds of the invention in admixture with one or more pharmaceutically acceptable carriers, for example those described in Remington's Pharmaceutical Sciences Handbook, XVII Ed., Mack Pub., N.Y., U.S.A.
  • Administration of the compounds of the present invention may be accomplished according to patient needs, for example, orally, nasally, parenterally (subcutaneously, intravenously, intramuscularly, intrasternally and by infusion), by inhalation, rectally, vaginally, topically, locally, transdermally, and by ocular administration.
  • Various solid oral dosage forms may be used for administering compounds of the invention including such solid forms as tablets, gelcaps, capsules, caplets, granules, lozenges and bulk powders.
  • the compounds of the present invention may be administered alone or combined with various known pharmaceutically acceptable carriers, diluents (such as sucrose, mannitol, lactose, starches) and excipients, including but not limited to suspending agents, solubilizers, buffering agents, binders, disintegrants, preservatives, colorants, flavorants, lubricants and the like.
  • diluents such as sucrose, mannitol, lactose, starches
  • excipients including but not limited to suspending agents, solubilizers, buffering agents, binders, disintegrants, preservatives, colorants, flavorants, lubricants and the like.
  • Time release capsules, tablets and gels are also advantageous in administering the compounds of the present invention.
  • liquid oral dosage forms may also be used for administering compounds of the invention, including aqueous and non-aqueous solutions, emulsions, suspensions, syrups, and elixirs.
  • dosage forms can also contain suitable inert diluents known in the art such as water and suitable known excipients such as preservatives, wetting agents, sweeteners, flavorants, as well as agents for emulsifying and/or suspending the compounds of the invention.
  • the compounds of the present invention may be injected, for example, intravenously, in the form of an isotonic sterile solution. Other preparations are also possible.
  • Suppositories for rectal administration of the compounds of the present invention may be prepared by mixing the compound with a suitable excipient such as cocoa butter, salicylates and polyethylene glycols.
  • Formulations for vaginal administration may be in the form of cream, gel, paste, foam, or spray formula containing, in addition to the active ingredient, known suitable carriers.
  • the pharmaceutical composition may be in the form of creams, ointments, liniments, lotions, emulsions, suspensions, gels, solutions, pastes, powders, sprays, and drops suitable for administration to the skin, eye, ear or nose. Topical administration may also involve transdermal administration via means such as transdermal patches.
  • the compounds according to the invention are preferably administered by inhalation.
  • Inhalable preparations include inhalable powders, propellant-containing metering aerosols or propellant-free inhalable formulations.
  • the powder may be filled in gelatine, plastic or other capsules, cartridges or blister packs or in a reservoir.
  • a diluent or carrier generally non-toxic and chemically inert to the compounds of the invention, e.g. lactose or any other additive suitable for improving the respirable fraction may be added to the powdered compounds of the invention.
  • Inhalation aerosols containing propellant gas such as hydro fluoroalkanes may contain the compounds of the invention either in solution or in dispersed form.
  • the propellant-driven formulations may also contain other ingredients such as co-solvents, stabilizers and optionally other excipients.
  • the propellant-free inhalable formulations comprising the compounds of the invention may be in form of solutions or suspensions in an aqueous, alcoholic or hydroalcoholic medium and they may be delivered by jet or ultrasonic nebulizers known from the prior art or by soft-mist nebulizers such as Respimat ® .
  • the compounds of the invention may be administered as the sole active agent or in combination with other pharmaceutical active ingredients including those currently used in the treatment of respiratory disorders, e.g. beta 2 -agonists, corticosteroids and anticholinergic or antimuscarinic agents.
  • the dosages of the compounds of the present invention depend upon a variety of factors including the particular disease to be treated, the severity of the symptoms, the route of administration, the frequency of the dosage interval, the particular compound utilized, the efficacy, toxicology profile, and pharmacokinetic profile of the compound.
  • the compounds of the invention may be administered for example, at a dosage comprised between 0.001 and 1000 mg/day, preferably between 0.1 and 500 mg/day.
  • the dosage of the compounds of the invention is advantageously comprised between 0.01 and 20 mg/day, preferably between 0.1 and 10 mg/day.
  • the compounds of the invention alone or combined with other active ingredients may be administered for the prevention and/or treatment of any obstructive respiratory disease such as asthma, chronic bronchitis and chronic obstructive pulmonary disease (COPD).
  • any obstructive respiratory disease such as asthma, chronic bronchitis and chronic obstructive pulmonary disease (COPD).
  • COPD chronic obstructive pulmonary disease
  • any disease wherein PDE4 inhibition is required include: allergic disease states such as atopic dermatitis, urticaria, allergic rhinitis, allergic conjunctivitis, vernal conjunctivitis, eosinophilic granuloma, psoriasis, inflammatory arthritis, rheumatoid arthritis, septic shock, ulcerative colitis, Crohn's disease, reperfusion injury of the myocardium and brain, chronic glomerulonephritis, endotoxic shock, cystic fibrosis, arterial restenosis, atherosclerosis, keratosis, rheumatoid spondylitis, osteoarthritis, pyresis, diabetes mellitus, pneumoconiosis, toxic and allergic contact eczema, atopic eczema, seborrheic eczema, lichen
  • Alzheimer's disease multiple sclerosis, amylolaterosclerosis (ALS), multiple systems atrophy (MSA), schizophrenia, Parkinson's disease, Huntington's disease, Pick's disease, depression, stroke, and spinal cord injury.
  • ALS amylolaterosclerosis
  • MSA multiple systems atrophy
  • schizophrenia Parkinson's disease
  • Huntington's disease Huntington's disease
  • Pick's disease depression, stroke, and spinal cord injury.
  • EDC l-ethyl-3-(3-dimethylaminopropyl) carbodiimide);
  • DMAP 4-dimethylaminopyridine;
  • DMF dimethylformamide;
  • EtOAc Ethyl acetate;
  • RT room temperature;
  • THF tetrahydrofuran;
  • DCM dichloromethane;
  • Et20 diethyl ether;
  • EtOH ethyl alcohol;
  • IprOH or IPA isopropyl alcohol;
  • Ipr02 diisopropylether;
  • MsCl Methanesulfonyl chloride;
  • TFA trifluoroacetic acid;
  • CH3CN acetonitrile;
  • (Boc)20 ditertbutyl dicarbonate;
  • AcOH ace
  • Solvent A water:MeCN:HCOOH 95 :5 :0.05
  • Solvent B water:MeCN:HCOOH 5 :95 :0.05
  • MS/ESI + [MH] + values reported in the text below may be obtained either by MS instrument Waters ZQ (or equivalent) or by UPLC Waters instrument:
  • Step 1 Synthesis of (S)-4-(2-(2-(tert-butoxycarbonylamino)acetoxy)-2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1- oxide (2):
  • Step 3 Synthesis of (S)-4-(2-(2-(4-(N-(tert-butoxycarbonyl)- methylsulfonamido)-3-(cyclopropylmethoxy)benzamido)-acetoxy)-2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1- oxide (4)
  • Step 4 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(2-(3-(cyclopropylmethoxy)-4-(methylsulfonamido)- benzamido)acetoxy)ethyl)pyridine 1-oxide (5)
  • Step 1 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((4-nitrophenoxy)carbonyloxy)ethyl)pyridine 1- oxide (20)
  • Step 2 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(4-nitrobenzylcarbamoyloxy)ethyl)pyridine 1-oxide (21)
  • Step 4 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(4-(N-(methylsulfonyl)methylsulfonamido) benzylcarbamoyloxy)ethyl)pyridine 1-oxide (23)
  • Step 5 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(4-(methylsulfonamido)benzylcarbamoyloxy)ethyl) pyridine 1-oxide (24)
  • Step 3 Synthesis of tert-butyl 4-methoxy-3-nitrobenzyl(methyl)carbamate (47) l-(4-methoxy-3-nitrophenyl)-N-methylmethanamine (220 mg, 1.121 mmol) was dissolved in DCM (8 ml), Boc 2 0 (260 ⁇ , 1.121 mmol) and DMAP (137 mg, 1.121 mmol) were added and the reaction was stirred at RT for 2h. Additional Boc 2 0 (390 ⁇ , 1.683 mmol) and DMAP (68.5 mg, 0.561 mmol) were added over 48h stirring at the same temperature.
  • Step 4 Synthesis of tert-butyl 3-amino-4-methoxybenzyl(methyl)- carbamate (48)
  • Step 5 Synthesis of tert-butyl 3-amino-4-methoxybenzyl(methyl)- carbamate (49)
  • tert-Butyl 3-amino-4-methoxybenzyl(methyl)carbamate (265.3 mg, 0.996 mmol) was dissolved in pyridine (3000 ⁇ , 37.1 mmol) and cooled to 0°C. MsCl (93 ⁇ , 1.195 mmol) was added dropwise and the reaction was stirred at RT for lh. The solution was diluted with NH 4 C1 sat. sol. and extracted twice with DCM.
  • tert-Butyl 4-methoxy-3-(methylsulfonamido)benzyl(methyl)carbamate (60.4 mg, 0.175 mmol) was dissolved in DCM (5 ml), HCl 4M in dioxane (250 ⁇ , 1.000 mmol) was added and the reaction was stirred at RT overnight. Additional HCl 4M in dioxane (500 ⁇ , 2.00 mmol) were added over 30h stirring at the same temperature.
  • Step 7 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((4-methoxy-3-(methylsulfonamido)benzyl)- (methyl)carbamoyloxy)ethyl)pyridine 1-oxide (51)
  • Step 8 Synthesis of tert-butyl 4-methoxy-3-(N-(2-morpholinoethyl)- methylsulfonamido)benzyl(methyl)carbamate (52)
  • tert-Butyl 4-methoxy-3-(methylsulfonamido)benzyl(methyl)carbamate (189.1 mg, 0.549 mmol) was dissolved in dry DMF (10 ml) and cooled to 0°C. NaH (60% w/w dispersion in mineral oil, 48.3 mg, 1.208 mmol) was added and the mixture was stirred 5 min at 0°C and then 5 min at RT. 4-(2-Chloroethyl)morpholine hydrochloride (123 mg, 0.659 mmol) was added and the mixture was stirred at RT for overnight. Additional NaH (43.93 mg, 1.098 mmol) was added over 4 days stirring at RT.
  • Step 9 Synthesis of N-(2-methoxy-5-((methylamino)methyl)phenyl)-N-(2- morpholinoethyl)methanesulfonamide hydrochloride (53)
  • Step 10 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((4-methoxy-3-(N-(2-morpholinoethyl)- methylsulfonamido)benzyl)(methyl)carbamoyloxy)ethyl)pyridine 1-oxide (54) N-(2-methoxy-5-((methylamino)methyl)phenyl)-N-(2-morpholinoethyl)- methanesulfonamide (87 mg, 0.244 mmol), (S)-3,5-dichloro-4-(2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)-2-((4-nitrophenoxy)- carbonyloxy)ethyl)pyridine 1-oxide (prepared with an analogous procedure to that described in Scheme 3, Step 1) (130 mg, 0.
  • Step 1 Synthesis of N,N'-(4,4'-disulfanediylbis(4,l-phenylene)) dimethanesulfonamide (55)
  • N,N'-(4,4'-disulfanediylbis(4, l-phenylene))dimethanesulfonamide (500 mg, 1.236 mmol) was dissolved in THF (10 ml) and triphenylphosphine (648 mg, 2.472 mmol) was added. The mixture was stirred at RT overnight, then the solvent was evaporated, the crude was dissolved in DCM (30 ml) and washed with NaOH 0.5M (4x). The inorganic fraction were combined and made acid with HCl 6M. The resulting white solid was extracted with EtOAc (4x).
  • Step 1 and 2 Synthesis of N,N'-(3,3'-disulfanediylbis(3,l- phenylene))dimethanesulfonamide (58)
  • Step 4 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((3-(methylsulfonamido)phenylthio)carbonyloxy)- ethyl) pyridine 1-oxide (60)
  • Step 5 Synthesis of N,N'-(3,3'-disulfanediylbis(3,l-phenylene))bis(N-(2- morpholinoethyl)methanesulfonamide) (61):
  • Step 7 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((3-(N-(2-morpholinoethyl)methylsulfonamido)- phenylthio)carbonyloxy)ethyl)pyridine 1-oxide (63):
  • Step 6 and Step 7 Synthesis of S-3-(cyclopropylmethoxy)-4- (methylsulfonamido)phenyl O-ethyl carbonodithioate (69)
  • Step 8 Synthesis of N-(2-(cyclopropylmethoxy)-4-mercaptophenyl)- methanesulfonamide (70)
  • Step 9 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-((3-(cyclopropylmethoxy)-4-(methylsulfonamido)- phenylthio)carbonyloxy)ethyl)pyridine 1-oxide (71)
  • Step 1 Synthesis of 4-((S)-2-((R)-2-(((9H-fluoren-9-yl)methoxy)- carbonylamino)-4-(trityloxy)butanoyloxy)-2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (72):
  • Step 2 Synthesis of 4-((S)-2-((R)-2-(((9H-fluoren-9-yl)methoxy)- carbonylamino)-5-hydroxypentanoyloxy)-2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (73)
  • Step 3 Synthesis of 4-((S)-2-((R)-2-(((9H-fluoren-9-yl)methoxy)- carbonylamino)-5-acetoxypentanoyloxy)-2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (74)
  • Step 4 Synthesis of 4-((S)-2-((R)-5-acetoxy-2-aminopentanoyloxy)-2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1- oxide (75)
  • Step 5 Synthesis of 4-((S)-2-((R)-5-acetoxy-2-(3,4- dimethoxyphenylsulfonamido)pentanoyloxy)-2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (76)
  • Step 1 Synthesis of (S)-4-(2-(3-tert-butoxy-3-oxopropanoyloxy)-2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1- oxide (77)
  • Step 2 Synthesis of (S)-4-(2-(2-carboxyacetoxy)-2-(3- (cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1- oxide (78):
  • Step 4 Synthesis of (S)-4-(2-(3-(4-(N-(tert-butoxycarbonyl)- methylsulfonamido)-3-(cyclopropylmethoxy)benzyloxy)-3-oxopropanoyloxy)-2- (3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (80)
  • Step 5 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(3-(3-(cyclopropylmethoxy)-4-(methylsulfonamido)- benzyloxy)-3-oxopropanoyloxy)ethyl)pyridine 1-oxide (81)
  • Step 1 Synthesis of benzyl 3-(4-(methylthio)phenylamino)-3- oxopropanoate (85)
  • Step 2 Synthesis of 3-(4-(methylthio)phenylamino)-3-oxopropanoic acid (86) Benzyl 3-(4-(methylthio)phenylamino)-3-oxopropanoate (150 mg, 0.476 mmol) was dissolved in MeOH (1.5 ml). NaOH 1M (500 ⁇ ) was added, and the reaction was stirred at 40°C for 2h to achieve completion. The reaction mixture was diluted with HCl IN and extracted with EtOAc. The organic phase was washed with HCl IN and brine, dried over Na 2 S0 4 and concentrated under vacuum to give 3-(4-(methylthio)phenylamino)-3-oxopropanoic acid (90 mg, 84% yield).
  • Step 3 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(3-(4-(methylthio)phenylamino)-3- oxopropanoyloxy)ethyl)pyridine 1-oxide (87)
  • Step 1 Synthesis of benzyl 3-(3,4-dimethoxyphenylamino)-3- oxopropanoate (88)
  • Step 2 Synthesis of 3-(3,4-dimethoxyphenylamino)-3-oxopropanoic acid (89) Benzyl 3 -(3, 4-dimethoxyphenylamino)-3 -oxopropanoate (200 mg, 0.607 mmol) was dissolved in MeOH and then Pd/C 5% (129 mg, 0.061 mmol) was added. The solution was shaken under hydrogen atmosphere at 30 psi on a Parr apparatus for 30 min. The catalyst was filtered off and the solvent removed under vacuum to give 3-(3,4-dimethoxyphenylamino)-3-oxopropanoic acid (120 mg, 83% yield).
  • Step 3 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(3-(3,4-dimethoxyphenylamino)-3- oxopropanoyloxy)ethyl)pyridine 1-oxide (90)
  • reaction mixture was treated with water (30 ml) and then filtered through a sintered glass funnel. The filtrate was partitioned between EtOAc and brine and the aqueous phase was extracted with EtOAc (2x). The combined organic layers were dried over Na 2 S0 4 and the solvent was removed under vacuum affording 2.52 g of crude product.
  • Step 2 Synthesis of ethyl 2-(tert-butoxycarbonyl(3,4-dimethoxybenzyl)- amino)acetate (92)
  • Step 3 Synthesis of 2-(tert-butoxycarbonyl(3,4-dimethoxybenzyl)amino)- acetic acid (93)
  • Step 4 Synthesis of (S)-4-(2-(2-(tert-butoxycarbonyl(3,4- dimethoxybenzyl)amino) acetoxy)-2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl) ethyl)-3,5-dichloropyridine 1-oxide (94)
  • Step 5 Synthesis of (S)-3,5-dichloro-4-(2-(3-(cyclopropylmethoxy)-4- (difluoromethoxy)phenyl)-2-(2-(3,4-dimethoxybenzylamino)acetoxy)- ethyl)pyridine 1-oxide hydrochloride (95)
  • Step 2 Synthesis of methyl 2-((4-aminobenzyl)(methyl)amino)acetate (98)
  • Step 3 Synthesis of methyl 2-(methyl(4-(methylsulfonamido)- benzyl)amino)acetate (99)
  • Step 5 Synthesis of allyl 2-(methyl(4-(methylsulfonamido)benzyl)- amino)acetate (101)

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Abstract

La présente invention concerne des inhibiteurs de l'enzyme phosphodiestérase 4 (PDE4). Plus particulièrement, l'invention concerne des composés qui sont des dérivés d'alcools alkyliques de 1-phényl-2-pyridinyle, des procédés de préparation de tels composés, des compositions les contenant et leur utilisation thérapeutique.
PCT/EP2012/067954 2011-09-26 2012-09-13 Dérivés d'alcools alkyliques de 1-phényl-2-pyridinyle en tant qu'inhibiteurs de phosphodiestérase Ceased WO2013045280A1 (fr)

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EP12770435.1A EP2760838B1 (fr) 2011-09-26 2012-09-13 Dérivés de 1-phényl-2-pyridinyl alkyl alcool en tant qu'inhibiteurs du phosphodiestérase
CN201280046755.4A CN103827088B (zh) 2011-09-26 2012-09-13 作为磷酸二酯酶抑制剂的1‑苯基‑2‑吡啶基烷基醇的衍生物

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WO2015185130A1 (fr) * 2014-06-04 2015-12-10 Chiesi Farmaceutici S.P.A. Dérivés de 3,5-dichloro,4-(3,4-(cyclo-)alcoxyphényl)--2-carbonyloxy)éthyl)pyridine utilisés comme inhibiteurs de pde-4
WO2015185128A1 (fr) * 2014-06-04 2015-12-10 Chiesi Farmaceutici S.P.A. Dérivés de 3,5-dichloro,4-(3,4-(cyclo-)alcoxyphényl)-2-carbonyloxy)éthyl)pyridine utilisés comme inhibiteurs de pde-4

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EP2022783A1 (fr) 2007-08-08 2009-02-11 CHIESI FARMACEUTICI S.p.A. Dérivés d'alcools 1-phényl-2-pyridinylalkyliques en tant qu'inhibiteurs de la phosphodiestérase
EP2216327A1 (fr) 2009-02-06 2010-08-11 CHIESI FARMACEUTICI S.p.A. Benzoate de (1-Phenyl-2-Pyridin-4-yl)ethyle en tant qu'inhibiteurs de phosphodiestérase
JP2014518203A (ja) 2011-06-06 2014-07-28 キエスィ ファルマチェウティチ エス．ピー．エー． ホスホジエステラーゼ阻害剤としての１−フェニル−２−ピリジニルアルキルアルコール誘導体
CN104334542A (zh) 2012-06-04 2015-02-04 奇斯药制品公司 作为磷酸二酯酶抑制剂的1-苯基-2-吡啶基烷基醇的衍生物
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MX389002B (es) 2013-10-22 2025-03-20 Chiesi Farm Spa Proceso para la preparación de un inhibidor de fosfodiesterasa (pde4).
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TW201710254A (zh) * 2015-06-01 2017-03-16 吉斯藥品公司 胺基酯衍生物
EP3556363B1 (fr) * 2016-12-14 2024-03-06 SK Biopharmaceuticals Co., Ltd. Utilisation d'un composé carbamate pour prévenir, soulager ou traiter le prurit
CN108276307A (zh) * 2018-01-17 2018-07-13 常熟浸大科技有限公司 3-氰基-4-烃氧基苯甲酸酯的合成方法

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WO2015185130A1 (fr) * 2014-06-04 2015-12-10 Chiesi Farmaceutici S.P.A. Dérivés de 3,5-dichloro,4-(3,4-(cyclo-)alcoxyphényl)--2-carbonyloxy)éthyl)pyridine utilisés comme inhibiteurs de pde-4
WO2015185128A1 (fr) * 2014-06-04 2015-12-10 Chiesi Farmaceutici S.P.A. Dérivés de 3,5-dichloro,4-(3,4-(cyclo-)alcoxyphényl)-2-carbonyloxy)éthyl)pyridine utilisés comme inhibiteurs de pde-4
US9890151B2 (en) 2014-06-04 2018-02-13 Chiesi Farmaceutici S.P.A. 3,5-dichloro,4-(3,4-(cyclo-)alkoxyphenyl)- 2-carbonyloxy)ethyl)pyridine derivatives as PDE-4 inhibitors
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US20130079313A1 (en) 2013-03-28
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